Leo II
E496038
Leo II is a faint dwarf spheroidal galaxy in the constellation Leo that orbits the Milky Way as one of its satellite galaxies.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Leo II canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5129095 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Leo II Context triple: [Leo II Dwarf Galaxy, otherName, Leo II]
-
A.
Leo II
Leo II was a short-reigning Eastern Roman (Byzantine) emperor in the late 5th century, notable for being the grandson and brief successor of Emperor Leo I.
-
B.
Severus II
Severus II was a Roman emperor of the early 4th century who ruled as a Western Augustus during the Tetrarchy before being overthrown in the civil wars that followed Diocletian’s abdication.
-
C.
Tiberius II Constantine
Tiberius II Constantine was a 6th-century Byzantine emperor known for his military campaigns against the Persians and Avars and for his relatively generous and popular rule before being succeeded by Maurice.
-
D.
Leo I
Leo I is a faint dwarf spheroidal galaxy and satellite of the Milky Way located in the constellation Leo.
-
E.
Leo I
Leo I was a 5th-century Eastern Roman emperor (reigned 457–474 AD) known for strengthening imperial independence from Germanic military influence and for commissioning the massive expedition against the Vandals.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Leo II Target entity description: Leo II is a faint dwarf spheroidal galaxy in the constellation Leo that orbits the Milky Way as one of its satellite galaxies.
-
A.
Leo II
Leo II was a short-reigning Eastern Roman (Byzantine) emperor in the late 5th century, notable for being the grandson and brief successor of Emperor Leo I.
-
B.
Severus II
Severus II was a Roman emperor of the early 4th century who ruled as a Western Augustus during the Tetrarchy before being overthrown in the civil wars that followed Diocletian’s abdication.
-
C.
Tiberius II Constantine
Tiberius II Constantine was a 6th-century Byzantine emperor known for his military campaigns against the Persians and Avars and for his relatively generous and popular rule before being succeeded by Maurice.
-
D.
Leo I
Leo I is a faint dwarf spheroidal galaxy and satellite of the Milky Way located in the constellation Leo.
-
E.
Leo I
Leo I was a 5th-century Eastern Roman emperor (reigned 457–474 AD) known for strengthening imperial independence from Germanic military influence and for commissioning the massive expedition against the Vandals.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | dwarf spheroidal galaxy ⓘ |
| absoluteMagnitudeV | about −9.8 ⓘ |
| angularSize | about 12 arcminutes ⓘ |
| apparentMagnitudeV | about 12.6 ⓘ |
| belongsTo |
Leo constellation region
ⓘ
Local Group ⓘ |
| catalog |
Caldwell
ⓘ
DDO ⓘ PGC ⓘ UGC ⓘ |
| constellation | Leo ⓘ |
| contains |
RR Lyrae variable stars
ⓘ
horizontal branch stars ⓘ old red giant stars ⓘ |
| darkMatterContent | high mass-to-light ratio ⓘ |
| declination | +22° 09′ 06″ ⓘ |
| discoveredBy | Albert George Wilson ⓘ |
| discoverySite | Palomar Observatory ⓘ |
| discoveryYear | 1950 ⓘ |
| distanceFromEarth |
about 210 kiloparsecs
ⓘ
about 690000 light-years ⓘ |
| distanceFromMilkyWayCenter | about 230 kiloparsecs ⓘ |
| environment | outer halo of the Milky Way ⓘ |
| galaxyType | dwarf spheroidal ⓘ |
| gasContent | very low ⓘ |
| gasPhase | mostly devoid of neutral hydrogen ⓘ |
| hostGalaxy | Milky Way ⓘ |
| locatedIn | Northern celestial hemisphere ⓘ |
| luminosityClass | low-luminosity dwarf galaxy ⓘ |
| memberOf |
Milky Way satellite system
ⓘ
linked to:
Milky Way
|
| metallicity | low ⓘ |
| morphologicalType | dSph ⓘ |
| orbits | Milky Way ⓘ |
| otherName |
Caldwell 46
ⓘ
DDO 93 ⓘ Leo B ⓘ PGC 34176 ⓘ UGC 6253 ⓘ |
| radialVelocity | about 79 km/s ⓘ |
| rightAscension | 11h 13m 28s ⓘ |
| satelliteOf | Milky Way ⓘ |
| shape | roughly spherical ⓘ |
| starFormationActivity | quiescent ⓘ |
| starFormationHistory | dominantly more than 7 billion years ago ⓘ |
| stellarPopulation | old ⓘ |
| surfaceBrightness | low ⓘ |
| visibility | faint ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Leo II Description of subject: Leo II is a faint dwarf spheroidal galaxy in the constellation Leo that orbits the Milky Way as one of its satellite galaxies.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.